Thermal loss in espresso brewing can have big impacts in the consistency and overall flavor. Here are some ways you can keep thermal integrity intact.
Roasting of coffee has a direct impact on bean density, and this has further implications on how we extract our coffee. Espresso is affected more clearly than filter brewing.
Even dosing and distribution of coffee is possibly the most important element in espresso extraction. Here are my thoughts on why and a few techniques to try in achieving better results.